I have seen two reviews of these - one on Bad Guy Good Audio Reviews and one in Head Fi. The IEMs seem quite appealing but I am wondering if there have been any other reviews of which community members are aware. This is a bigger investment than KZs.
I also have my usual question about warranty/returns - anything from the manufacturer beyond the Massdrop basic warranty? Is there a US service center? (Probably not, but one can hope.)

If you want comparisons with TFZ iems I think you can ask audio123 directly on his/her site. I had a question before, and was replied within a day. Pretty cool :)
PS: Do share your findings here, it would be a nightmare if everyone started asking separately HAHAHA XD